Razor-grinder



s. o. HEIN-DL.

`RAZOR GHINDER.

APPLICATION FILED AUG.21, 1920.

mm'm Patented @en M, 11m; v 3 SHEETS-SHEET I.

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Hilmlllll| S. 0. HEINDL.

RAZOR GRINDER. APPLlcArloN FILED -AuG.21. 1920.

Patented Oct. H, 119211..

3 SHEETS-SHEET 2- S. O. HEINDL. RAZORGRINDEB. APPLICATION FILED AuG.21, 192o.

Patented Oct.l M, 1921K.,

. 6 SHEETS-SHEET 3.

Af falli/1f mi WM wwf/11ml@ VlSTEPHEN o. nEmnL, or

CHICAGO, ILLINOIS, ASSIGNOR OF ONE-HALF TO `IERNES'I i ZIEI'CY,V 0F CHICAGO, ILLINOIS. d j j i j EAZOR-GRINDEEL Leashes;-

.i To alllwromftmay concern:

j structure, easyto manufacture `Be it known that I, STEPHEN O. HEINDL, a former subject of the Emperor of Austria, (who has declared his intention of becoming van American citizen,) residing at Chicago, in thecounty of Cook and State of Illinois, have inventedcertain new` and useful Improvements in Razor-Grinders,v of `which the following is a specification.

My invention relates to grinding machines and moreV specifically to an improved machine for grinding razor blades.` i 4rIhe Vprimary object of the invention is to j provide an efficient machine for grinding the concave lsides of razor blades or any "similarly: shaped tools. y l i Another object is to provide a work hold'- ing means permitting-of continued and speedyoperation ofthe device. d Y

A furtheriobject is to Yembody such a machine in a relatively compact and." simple durable "in service. j `Fur`ther objects and advantages of my invention :will become apparent" as the descriptic'inl proceeds.

i In the accompanying drawings, Figure 1 is a side view of an illustrative embodiment of -my invention, certain parts being broken away. `iFig. 2 isan end view of the grinding wheel supporting and drlvlng means.

Fig. 3 isa section through the work holder i slides showing thework holder Ain end elevation. Figff4 is aplan view of the main frame member of the detachable work rest,

andFigj is aside view'of the work rest partly in section.` Fig. 6 is a section through l the work holdingclamp. Fig. 7 is an end view and Fig. 8 alongitudinalsection of the mounting atthe front end of the work `carriage slides. Fig 9.is"a section showing the mountingv ofthe grinding shaft brackets of the feed shaft. Fig. 10 `is a section on ,line 10e-10 of Fig.9,f and Fig.` 11 is a eentral longitudinal section through one of the `grinding shaft brackets. f j "In the embodiment of 'my inventlon seulected for illustration, four legs .10 support aframe 12 at" its corners and are preferably braced by cross pieces 14 toform a rigid structure.- T-shapedstandards 16 mounted `opposite each other on the sides of the frame 12 supportthree transverse shafts compris.- ing twoguide shafts 18, and a `feedshaft 20.

A pair of brackets 22 are slidably supported Aend -ofits bracket and the other shaft 34 .i Specification of`LettersiPatent. Paige/knitted Umb, 11, 11921, lfippiitaaon"u med Augst 21, 1920. serial Noyaoanao.

on the guide shafts 18 and maybe fed toward and away from the center ofthe machine simultaneously by means best illustratedin Fig.` 9 comprising right and left 4hand screw threads on the feed shaft 2O engagingnuts 24 seated in counterbores in the bracket casting and prevented from rotation by suitable pins 26 entering circular apertures defined by semi-circular notches in the nuts-24 and brackets 22. Each bracket carries a shaft extending longitudinally of the machine and journaled in suitable bearings l2S carried by the bracket.- One of the shafts 30 carries a drive pulley 32 near the front carries a similar drive pulley 36 nearthe rear "end of its bracket. pressed against the nuts 24 by suitable com- "preion springs 38 encirclingthe feed shaft j 2O which r feed shaft may be "rotated by a handle 40 Ato move the grinding wheels towardandaway from the work. j

I. have provided suitable means for delivering power to the shafts 36 and 34 to `drive the grinding wheels carried thereby in the directions indicated lby the arrows in Fig. 3. Referring to Figs. l and 2', a drive shaft 42 carries a tight pulley 44 and a loose pulley 46 tofwhich power may be delivered by a beltffrom anysuitableV source. Brackets 48"clamped on the legs 10 slidably support the longitudinally extending rod 50 carry- 'I hebrackets 2,2V are ing belt shifting fingers 52 and a suitable handle 54 preferably at the front end of the machine. The shaft 42 also carries 'a pulley 56 connectedby belt 58 to the pulley32 on the shaft 30. The drive shaft 42 and a similarlshaft 60 are journaled in suitable bearings in brackets 62 and 64-depending from the frame 12,V and project at the rear end of Athe machine to carry gears 66 for connectingV the shafts to' drive them in opposite directions at equal speeds. A suitable gear cover 68-1nay be employed to protect the gears. Shaft `34 is driven froma pulley 70 on shaft 60 by a suitable belt 72. It will be "seen that the pulleys 44and 46 are so arranged that the belt may extend therefrom laterally past the transmission to shafts 30 and 34 at anyconvenient angle in either direction.

`For supporting the work in proper vertical adjustment withrespect to the gri uding wheels and'moving it into engagement therewith, I provide a longitudinally reciprocating frame or carriage carrying a detachable work holder. Referring to Figs. 1 and 3, a vertical framemember or carriage 74 is enlarged to form-'journals 76 for slidably 'supporting the same on guide rods 78 and fastened on the ends of bolts 88 and has threaded engagement with a vertical ad- Y justing'screw 96 rotatablv but; non-slidably mounted in the cross piece 92 and carrying a knurled hand wheel 98 or other suitable ymeans for rotating it to adjust the height ot the plate84. Y Y

A guide 100 is carried bythe plate 84 on which the detachable work carrier is supported. This work carrier comprises a main work supporting element illustratedin Fig.

4 comprising a front portion 102 having the kirregular cross sectionillustrated in Fig. 3,

a central portion 104 havingslots 106 cut in its opposite sides, and a cylindrical stem uitable clamping members 110 rest in the slots 106 andmay be drawn toward eachother by means of a wingnut 112 and bolt 114 to securely clamp the handle 116 of a razor orother similar. tool, the'blade of which restson the narrow upper edge of the front portion`102.

For detachably mounting the work cari rier I'provide a guideway in the portion 102 engaging the guide carried Yby the plate 84 and quick detachable stop means for holding the Vwork holder against longitudinal displacement on the guide. The means illustrated for this purpose comprises a rotatable sleeve 118 on the stem 108 carrying a radially projecting pin 120 and resiliently urged in a certain direction by a coiled spring 122 preferably housed within the sleeve. The rotation of the sleeve` may be limited to approximately 90 degrees by engagement of projecting lug 124 on the stationary cap 128 with the ends of the cutaway portion 126 in the sleeve. As the holder slides into place, the pin 120 encounters the beveled end 13,0 of plate 84 and is deflected thereby,

vpassing down the side of the plate and snapping into a slot 132 to hold the parts securely in position. c

The means I have provided for reciprocating the carriage-74 on the lguides 78 combracket 62 and at its front endby a supporting strip 136 which strip also supports the rearv ends of the guide rods 78 and is braced at its ends by rods 138 extending forwardly `work between the wheels.

from the bracket 62. This gear is driven from the pinion 140 mounted on the shaft 42 and carries a cam 142 adapted to engage the roller 144 carried by the end of the plunger 82 to reciprocate the same axially against the force of a compression spring 147. The plunger extends slidably but non-rotatably through a face plate 148 (see Fig. 8) mount ed in the end of a tube 150 supported on the frame 12, which tubealso functions to support the front ends of the guide rods 7 8 by means of ears 151 receiving said guide rods. An enlarged head 152 at the front end of the plunger normally reciprocates, as shown in Fig. 8, from the position shown in the drawings to a position at the rear end of the cavity 154 defined by a sleeve 156 rotatably supported inside the tube 150 but prevented from axial movement by va suitable pin 158 entering an annular groove 160. The head -162 on the sleeve 156 may be rotated by a suitable handle 164 to draw a nut 166 splined on the plunger 82 toward the right and limit the movement of the plunger to any desired extent. This adjustment may be used to determine the length of stroke used. The nut may also be moved to thev right until the plunger is clamped in stationary position with the spring 147 compressed and the roller 144 held out of contact with the cam 142.

Water xr other suitable coolant may be delivered to the grinding wheels 168y as by means of a nozzle 170 and will be received in a tank 172 located beneath the grinding wheels. This tank preferably includes lat eral portions extending as indicated in dotted lines at 174, past the cam 142 and gear 134, and the walls may be cut away to allow for the guide rods 78 and plunger 82.

In operating my device, when it is first adjusted Jfor use, a razor will be clamped in position on the detachable work holder and the work holder slid along guidewaysv 102 until the radial pin 120 snaps into the slot 132. The grinding wheels 168 are withdrawn from contact with the work and the work advanced to position between them, in which position the vertical height of plate 84 may be adjusted to properly position the The machine is then started and the operator advances the grinding wheels by turning the crank 40 until the razor is properly ground. To insert a new piece of work, the operator may rotate the sleeve 118 without stopping the machine and withdraw the work holder from its guides, the ends of which are slightly tapered for a short distance to facilitate removal and replacement of the work holder. A new piece of work may then be substituted for the i'inished piece or a different holder with the new work already clamped in place may be substituted for the one removed, and

1,393,283 A la;

- -the work holder slid back on the guideways and pushed forward until the pin 120 engages slotl 132 without stoppingthe machine.

lt will be obvious that if desired, however, the machine may be readily stopped as an entirety by means of handle 54, or the carriage 74 may be drawn back by a few turns of the sleeve 156 to hold it stationary in its forwardmost position clear of the grinding While l have illustrated and described in detail the preferred embodiment of my invention, it should be clearly understood that the disclosure is merely for purposes of illustration and that many modifications and variations will naturally occur to those skilled in the art. `I aim in the subjoined claims to cover all such legitimate variations and modifications.

l claim as my invention: 1 1. In a device ofthe class described, a pair of grinding wheels, a reciprocatory carriage adapted to carry `a piece of work to and fro between said wheels, and manually adjustable means j for limiting the longitudinal displacement of 'said vcarriage in its reciprocatory movement between said wheels simultaneously with the continuation of said movement.

g 2.v In a device ofthe class described, a pair of grinding wheels, a carriageadapted to carry a piece of work to and frobetween said wheels, automatic cam means for reciprocating said carriage, and manual means for limiting: the reciprocatory displacement of said Vcarriage simultaneously A with its operation.

3. In a device of the class described, a pair of grinding wheels, a reciprocatory carriage having a tapered endjand a lateral slot, a tool holder having longitudinal slidable attachment to-said carriage for sup` porting a tool in position to-be moved between said grinding wheels by the movement of said carriage, a cylindrical stem fixed to the holder, a sleeve manually ro` tatable on said stem between certain stopped positions, a radial pin fixed in said sleeve adapated to slidably engage the tapered end of said carriage and normally restin said slot to secure said tool holder against longitudinal displacement on said carriage,'and

resilient means tending to hold said pin in engagement with said slot.

f1. In a device of the class described, a

vpair of grinding wheels, a reciprocatory carriage having a tapered end and a lateral` slot, a tool holder having longitudinal slidporting a tool in position to be moved beable attachment to said carriage for suptween vsaid grinding wheels by the movement of said carriage, a cylindrical stem fixed to the holder, a sleeve manually rotatable on said stem between certain stopped positions, a radial pin iXed in said sleeve 4adapted to slidably engage the tapered` end of said carriage and normally rest in said slot to secure said tool holder against displacement, and spring means coacting with Ythe holder from and replacing it on said carriagewithout interrupting the reciprocatory movement thereof, said means comprising a manually movable handle mounted on said tool holder, a member fixed on'said handle andadapted to engage said carriage in one position of the handle to prevent relative movement of said tool holder and said carriage, and resilient means tending to hold said member in such engagement with said carriage.

6. Ina device of the class described, a pair of grinding wheels, a carriage adapted to carry a piece of work to and fro between said wheels, automatic cam means for reciprocating said carriage in one direction, resilient means for moving said carriage in the other direction, and manually controlled means for limiting the extent of movement of the carriage caused by said resilient means. a

` 7. ln a device of the class described, a pair of grinding wheels, a reciprocatory carriage adapted to carry work betweensaid wheels, automatic cam means for moving said carriage in one direction, resilient means for moving said carriage in the other direction, a plunger movable with said carriage, a flanged head on the end of said plunger, a

fixed tube, an internally screw-threaded i sleeve rotatable within said tube and adapted to receive said head, an externally screw-threadedbushing slidably but nonrotatably mounted on said plunger and adapted to engage said sleeve internally and form an abutment for said head, and means for rotating the sleeve to variously position said bushing therein and limit the movement of saidplunger. 1 In testimony whereof l have hereunto set my hand.

STEPHEN O. HEINDL.V 

